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  • 1
    Electronic Resource
    Electronic Resource
    On the trapping rate of positrons in deformed lead over the temperature range 4-100 K
    Amsterdam : Elsevier
    Physics Letters A 64 (1978), S. 450-452 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(78)90680-1
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of protein and trace elements in human milk using NAA and XFR techniques (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 231 (1998), S. 21-23 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The principal objective pursued in this study is to establish the base-line data on protein content and on the status of elemental composition in human milk from Sudanese subjects. The protein content was derived by multiplying the nitrogen content by a factor 6.25. The nitrogen was determined using a 14 MeV neutron generator. The median values for crude protein and the total dry matter found in this study were 1.23% (volume) and 104 g/l, respectively. Some minor and trace elements of biological significance namely, Cl, K, Ca, Mn, Fe, Cu, Zn, Cr, Co and Mo were determined using energy dispersive X-ray fluorescence spectrometry. The results obtained show good compatibility with the data reported by the WHO on elemental composition of human milk from different geographical regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02387999
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  • 3
    Electronic Resource
    Electronic Resource
    Plutonium Isotopes in Sediments from the Sudanese Coast of the Red Sea (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 245 (2000), S. 411-414 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper presents the activity concentrations of Pu isotopes in surface marine sediments collected from the Sudanese coast of the Red Sea. The following concentration ranges were determined: 238Pu, 4.7–28.6 mBq/kg; 239+240Pu, 53–343 mBq/kg dry weight. The average activity ratios of 238Pu/239+240Pu (0.075±0.045 mBqk/kg) and 239+240Pu/137Cs (0.026±0.025 mBq/kg) are appropriately comparable to the literature values that are characteristic of the global fallout from the atmospheric nuclear weapon tests. However, 239+240Pu/137Cs ratio in sediments collected from the biologically rich fringing reef is an order of magnitude higher compared to other sampling locations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006747529666
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Fe2P2O7 and Fe2P4O12 studied between 5–800 K (1990)
    Springer
    Hyperfine interactions 57 (1990), S. 2179-2186 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mössbauer spectra of triclinic Fe2P2O7 indicate the existence of two crystallographic metal positions in the structure. In the paramagnetic region the two Mössbauer doublets are closely overlapping. The magnetic transition takes place at ≈ 21 K and the saturated fields are around 12 tesla for the two positions. In monoclinic Fe2P4O12 the two octahedrally coordinated metal positions give quite different quadrupole splittings (1.5 and 3 mm/s at room temperature) and hyperfine field values (42 and 12.5 Tesla at 5 K). The transition temperature is at ≈ 18.5 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405783
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  • 5
    Electronic Resource
    Electronic Resource
    Studies on Al Kidirate and Kapoeta meteorites (1994)
    Springer
    Hyperfine interactions 91 (1994), S. 551-555 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mössbauer spectroscopy (20–300 K), magnetic susceptibility measurements (77–350 K), scanning electron microscopy and X-ray diffraction experiments have been performed on two meteorite samples: one from an old fall (Kapoeta) and another from a very recent fall (Al Kidirate). The two specimens differ in their mineralogy. Chondrules appear to be absent in Kapoeta and it is probably a pyroxene-plagioclase achondrite with ferrohypersthene as the most abundant mineral. On the other hand, the Al Kidirate meteorite is an ordinary chondrite and the specimen consists of olivine, orthopyroxene, troilite and kamacite. The Mössbauer measurements confirm the above characterization, showing a paramagnetic doublet for the Kapoeta sample and at least two paramagnetic doublets and magnetic sextets for the Al Kidirate specimens. The former were assigned to Fe in pyroxene sites, while the latter was assigned to Fe in pyroxene, olivine, Fe-S and Fe-Ni alloys. The difference in the mineralogy of the two meteorites has also been reflected in the temperature-dependent magnetic susceptibility. The magnetization and the hyperfine interaction parameters will be discussed in relation to the mineralogy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02064569
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